JP7329613B2 - CONTROL DEVICE, AIR CONDITIONING SYSTEM AND CONTROL METHOD OF AIR CONDITIONING SYSTEM - Google Patents

Description

The present invention relates to control of an air conditioning system.

An air conditioning system comprising an internal air conditioner that takes in indoor air, adjusts the temperature, and outputs it indoors, and an outdoor air conditioner that takes in outdoor air for ventilation, adjusts the temperature, and outputs it indoors. There is (see Patent Document 1).
As a control method for an air conditioning system with this configuration, there is a latent heat/sensible heat separation air conditioning system in which the internal air conditioner mainly controls the temperature and the outdoor air conditioner mainly controls the humidity. Latent heat and sensible heat separation air conditioning aims at energy-saving operation.

In air conditioning that separates latent heat and sensible heat, a set temperature, which is a target temperature, is given to the indoor air conditioner, and a set humidity, which is a target humidity, is given to the outdoor air conditioner. Then, the air temperature and humidity desired by the user are realized by operating the internal air conditioner so as to achieve the set temperature and operating the outdoor air conditioner so as to achieve the set humidity.

Air conditioning systems are for improving the comfort of indoor spaces. PMV (Predicted Mean Vote) is an index for evaluating the comfort of an indoor space. PMV is an index calculated from six factors that affect thermal comfort. The six elements are room temperature, average radiant temperature, relative humidity, average wind speed, metabolic rate, and amount of clothing.

JP 2019-078501 A

Conventionally, the indoor air conditioner and the outdoor air conditioner are independently controlled. Therefore, there is a risk that appropriate control will not be performed based on comfort.
An object of the present invention is to enable appropriate control based on comfort.

A control device according to the present invention includes:
An internal air conditioner that takes in air from a target space, adjusts its temperature, and outputs it to the target space, and an outdoor air conditioner that takes in air from outside the target space, adjusts its temperature, and outputs it to the target space. A control device for controlling an air conditioning system comprising
a setting unit that receives input of information on comfort of the target space and sets a target value on the comfort;
a control unit that controls both the internal air conditioning unit and the external air conditioning unit based on the target value set by the setting unit.

In this invention, a target value for comfort is set, and both the internal and external air conditioning units are controlled based on the target value. Since both the indoor air conditioner and the outdoor air conditioner are controlled, appropriate control based on comfort is possible.

1 is a configuration diagram of an air conditioning system 10 according to Embodiment 1. FIG. 1 is a configuration diagram of an internal air conditioner 20 according to Embodiment 1. FIG. 1 is a configuration diagram of an outdoor air conditioner 30 according to Embodiment 1. FIG. 2 is a configuration diagram of an outside air supply unit 32 according to Embodiment 1. FIG. 2 is a configuration diagram of a control device 40 according to Embodiment 1. FIG. 4 is a flowchart showing the overall operation of the control device 40 according to Embodiment 1; 4 is a flowchart of specific processing according to the first embodiment; Explanatory drawing of the combination of temperature and humidity when target PMV is made low. Explanatory drawing of the combination of temperature and humidity in the case of raising target PMV. FIG. 4 is an explanatory diagram of combination identification processing according to the first embodiment; FIG. 4 is an explanatory diagram of target identification processing according to the first embodiment;

Embodiment 1.
*** Configuration description ***
A configuration of an air conditioning system 10 according to Embodiment 1 will be described with reference to FIG.
The air conditioning system 10 includes an internal air conditioner 20 , an outdoor air conditioner 30 , and a control device 40 . The internal air conditioner 20 takes in the air in the target space 50, adjusts the temperature of the air, and outputs the air to the target space. The outdoor air conditioner 30 takes in the air outside the target space 50 , adjusts the temperature, and outputs the air to the target space 50 . The control device 40 controls the indoor air conditioner 20 and the outdoor air conditioner 30 .

The configuration of an internal air conditioner 20 according to Embodiment 1 will be described with reference to FIGS. 1 and 2. FIG.
The interior conditioner 20 includes an outdoor unit 21 and one or more indoor units 22 . In FIGS. 1 and 2 , the internal air conditioner 20 includes two indoor units 22 . The outdoor unit 21 is installed outdoors, and each indoor unit 22 is installed in the ceiling or the like of the room that constitutes the indoor space that is the target space 50 . The outdoor unit 21 and each indoor unit 22 are connected by refrigerant pipes 23 . The outdoor unit 21 is provided with a temperature detection device 24 that detects the temperature of outside air. Each indoor unit 22 is provided with a temperature detection device 25 that detects the temperature of the indoor space that is the target space 50 .
The outdoor unit 21 includes a compressor 211 , a four-way valve 212 , an outdoor heat exchanger 213 and an outdoor fan 214 . Compressor 211 , four-way valve 212 and outdoor heat exchanger 213 are connected in sequence by refrigerant pipe 215 . Each indoor unit 22 includes an indoor heat exchanger 221 , an expansion valve 222 and an indoor fan 223 . The indoor heat exchanger 221 and the expansion valve 222 are sequentially connected by a refrigerant pipe 224 . One end of the refrigerant pipe 215 of the outdoor unit 21 and one end of the refrigerant pipe 224 of each indoor unit 22 are connected by the refrigerant pipe 23, and the other end of the refrigerant pipe 215 of the outdoor unit 21 is connected. An internal conditioning system is configured by connecting the other end of the refrigerant pipe 224 of each indoor unit 22 with the refrigerant pipe 23 .

The configuration of an outdoor air conditioner 30 according to Embodiment 1 will be described with reference to FIGS. 1 and 3. FIG.
The outdoor unit 30 includes an outdoor unit 31 and an outdoor air supply unit 32 . The outdoor unit 31 is installed outdoors, and the outside air supply unit 32 is installed in the ceiling or the like of the room that constitutes the indoor space that is the target space 50 . The outdoor unit 31 and the outside air supply unit 32 are connected by a refrigerant pipe 33 . The outdoor unit 31 is provided with a humidity detection device 34 that detects the humidity of the outside air. The outside air supply unit 32 is provided with a humidity detection device 35 that detects the humidity of the indoor space that is the target space 50 .
The outdoor unit 31 includes a compressor 311 , a four-way valve 312 , an outdoor heat exchanger 313 and an outdoor fan 314 . Compressor 311 , four-way valve 312 and outdoor heat exchanger 313 are connected in sequence by refrigerant pipe 315 . The outside air supply unit 32 includes a heat exchanger 321 and an expansion valve 322 . The heat exchanger 321 and the expansion valve 322 are sequentially connected by a refrigerant pipe 323 . One end of the refrigerant pipe 315 of the outdoor unit 31 and one end of the refrigerant pipe 323 of the outside air supply unit 32 are connected by the refrigerant pipe 33, and the other end of the refrigerant pipe 315 of the outdoor unit 31 is connected. By connecting the other end of the refrigerant pipe 323 of the outside air supply unit 32 with the refrigerant pipe 33, an external air conditioning system is configured.

A configuration of the outside air supply unit 32 according to the first embodiment will be described with reference to FIG. 4 .
The outside air supply unit 32 includes the heat exchanger 321 and the expansion valve 322 shown in FIG. Air supply fan 324 is a fan for supplying outdoor air to the room. The exhaust blower 325 is a blower for discharging indoor air to the outside. The heat exchanger 326 is a device that exchanges heat between the outdoor air taken in by the air supply fan 324 and the indoor air discharged by the exhaust fan 325 .

A configuration of the control device 40 according to the first embodiment will be described with reference to FIG.
The control device 40 is a computer.
The control device 40 includes hardware including a processor 41 , a memory 42 , a storage 43 and a communication interface 44 . The processor 41 is connected to other hardware via signal lines and controls these other hardware.

The processor 41 is an IC (Integrated Circuit) that performs processing. A specific example of the processor 41 is a CPU (Central Processing Unit). The memory 42 is a storage device that temporarily stores data. A specific example of the memory 42 is an SRAM (Static Random Access Memory) or a DRAM (Dynamic Random Access Memory). The storage 43 is a storage device that stores data. A specific example of the storage 43 is an HDD (Hard Disk Drive). A communication interface 44 is an interface for communicating with an external device. A specific example of the communication interface 44 is an Ethernet (registered trademark) or USB (Universal Serial Bus) port.

The control device 40 includes a setting unit 411, a specifying unit 412, and a control unit 413 as functional components. The identification unit 412 includes a combination identification unit 414, a load calculation unit 415, a power calculation unit 416, and a target identification unit 417 as functional components. The function of each functional component of the control device 40 is realized by software.
The storage 43 stores a program that implements the function of each functional component of the control device 40 . This program is read into the memory 42 by the processor 41 and executed by the processor 41 . Thereby, the function of each functional component of the control device 40 is realized.

In FIG. 5, each functional component of the control device 40 is realized by software. However, each functional component of control device 40 may be implemented in hardware. When each functional component is realized by hardware, it has an electronic circuit instead of the processor 11, the memory 12 and the storage 13. FIG. The electronic circuit is a dedicated circuit that realizes the functions of each functional component, memory 12 and storage 13 .
Electronic circuits include single circuits, composite circuits, programmed processors, parallel programmed processors, logic ICs, GAs (Gate Arrays), ASICs (Application Specific Integrated Circuits), and FPGAs (Field-Programmable Gate Arrays). be done. Each functional component may be implemented by one electronic circuit, or each functional component may be implemented by being distributed among a plurality of electronic circuits.

***Description of operation***
The operation of the control device 40 according to the first embodiment will be described with reference to FIGS. 6 to 11. FIG.
The operation procedure of the control device 40 according to Embodiment 1 corresponds to the control method of the air conditioning system 10 according to Embodiment 1. FIG. Also, a program that realizes the operation of the control device 40 according to Embodiment 1 corresponds to the control program of the air conditioning system 10 according to Embodiment 1. FIG.

The overall operation of control device 40 according to the first embodiment will be described with reference to FIG.
(Step S11: setting process)
The setting unit 411 receives input of information regarding the comfort of the target space 50 and sets a target value regarding the comfort of the target space 50 . Comfort is determined from at least temperature and humidity. In Embodiment 1, PMV shall be used as an index of comfort.
Specifically, the user operates the controller of the air conditioning system 10 to input information about the comfort level of the target space 50, such as "hot" or "cold." Then, the setting unit 411 sets a target value for comfort according to the input information about comfort. For example, when the information "hot" is input, the setting unit 411 sets a value lower than the currently set target PMV as the value of the target PMV, which is the target value. Further, for example, when the information "cold" is input, the setting unit 411 sets a value higher than the currently set target PMV as the value of the target PMV, which is the target value.

(Step S12: Specific processing)
The identifying unit 412 identifies one combination from a plurality of combinations of temperature and humidity that satisfy the target values set in step S11.
In the first embodiment, the specifying unit 412 controls the temperature and humidity of the target space 50 to be the temperature and humidity in the combination among the plurality of combinations of temperature and humidity that satisfy the target values set in step S11. A combination that reduces the total power, which is the sum of the power consumption of the indoor air conditioner 20 and the power consumption of the outdoor air conditioner 30, is specified.

(Step S13: control processing)
The control unit 413 controls the internal air conditioner 20 and the external air conditioner 30 so that the temperature and humidity of the target space 50 match the temperature and humidity in the combination specified in step S12.
Specifically, control unit 413 controls internal air conditioner 20 so that the temperature of target space 50 becomes the temperature in the combination specified in step S12. Further, the control unit 413 controls the outdoor air conditioner 30 so that the humidity in the target space 50 is equal to the humidity in the combination specified in step S12.

The specifying process (step S12 in FIG. 6) according to the first embodiment will be described with reference to FIG.
(Step S21: combination identification process)
The combination identification unit 414 identifies multiple combinations of temperature and humidity that satisfy the target PMV, which is the target value.
For parameters other than temperature and humidity when calculating PMV, fixed values may be used, or values roughly calculated from information obtained from sensors may be used. Also, if there are restrictions on the temperature and humidity that can be set as target values, the combination of temperature and humidity may not strictly match the target PMV. In other words, the target PMV may have some width.

A specific description will be given with reference to FIGS. 8 to 10. FIG.
When the target PMV is updated to a value lower than the current target PMV, the combinations of temperature and humidity that satisfy the target value include (A) lowering the temperature and raising the absolute humidity; and (C) raising the temperature and lowering the absolute humidity.
Assume that the currently set target PMV is 0 and the temperature and humidity of the target space 50 are the values indicated by the point X, as shown in FIG. Assume that the information "hot" is input in step S11 and the target PMV is newly set to -0.3. A dashed line L1 indicates a combination of temperature and humidity that gives a PMV of −0.3. That is, the PMV of the temperature and humidity indicated by the points on the dashed line L1 is -0.3. The dashed-dotted line L1 includes ranges corresponding to the above-described cases (A), (B), and (C) with respect to the temperature and humidity indicated by the point X.

When the target PMV is updated to a value higher than the current target PMV, the combination of temperature and humidity that satisfies the target value includes (A) lowering the temperature and increasing the absolute humidity, and (B') There is a case where the temperature and absolute humidity are raised, and (C) a case where the temperature is raised and the absolute humidity is lowered.
Assume that the currently set target PMV is 0, and the temperature and humidity of the target space 50 are the values indicated by the point X, as shown in FIG. Assume that the information "cold" is input in step S11 and the target PMV is newly set to +0.3. A dashed-dotted line L2 indicates a combination of temperature and humidity that gives a PMV of +0.3. That is, the PMV of the temperature and humidity indicated by the points on the dashed line L2 is +0.3. The dashed-dotted line L2 includes ranges corresponding to the above-described cases (A), (B'), and (C) with respect to the temperature and humidity indicated by the point X.

As shown in FIG. 10, the combination identifying unit 414 identifies a plurality of combinations of temperature and humidity that satisfy the target value by extracting a plurality of points on the straight line L3 indicating the target PMV set in step S11. .
Specifically, the combination identifying unit 414 extracts a plurality of points by extracting points at arbitrary intervals from line segments in possible temperature and humidity ranges of the straight line L3 indicating the target PMV. In FIG. 10, the combination identifying unit 414 extracts four points to determine a combination of a temperature of 25.0° C. and a humidity of 70%, a combination of a temperature of 25.5° C. and a humidity of 60%, and a temperature of 26.0° C. Four combinations are identified: a combination of 0° C. and 50% humidity, and a combination of 26.5° C. temperature and 40% humidity.
Note that the interval at which points are extracted from a line segment is arbitrary. Therefore, the number of points to be extracted is not limited to four, and more points may be extracted.

In some cases, only one of the temperature and the absolute humidity is changed and the other is not changed. In this case, control is performed in consideration of only the one to be changed. In other words, when the temperature is changed and the absolute humidity is not changed, only the internal air conditioner 20 should be controlled considering only the temperature. Conversely, when the absolute humidity is changed and the temperature is not changed, only the outdoor air conditioner 30 should be controlled considering only the absolute humidity.
A point on the boundary line B1 between the range in the case of (A) and the range in the case of (B) in FIG. 8, and the boundary between the range in the case of (B') in FIG. 9 and the range in the case of (C) A point on the line B3 is a combination in which the temperature is changed and the absolute humidity is not changed. Also, a point on the boundary line B2 between the range of (B) and the range of (C) in FIG. 8, and the range of (A) and (B') in FIG. and a point on the boundary line B4 of , the absolute humidity is changed and the temperature is not changed.

(Step S22: load calculation processing)
The load calculation unit 415 calculates the sensible heat load and the latent heat load for making the temperature and humidity of the target space 50 the temperature and humidity in the target combination for each of the plurality of combinations specified in step S21. Any method may be used to calculate the sensible heat load and the latent heat load.

For example, the load calculation unit 415 calculates the sensible heat load and the latent heat load by substituting information such as the outside air temperature and outside air humidity, and the temperature and humidity in the target combination into the theoretical formula. Note that the load calculation unit 415 can acquire the outside air temperature by the temperature detection device 24 and the outside air humidity by the humidity detection device 34 .

Also, for example, the load calculation unit 415 generates a first correlation expression between the difference ΔT between the outside air temperature and the temperature in the target combination and the sensible heat load. In addition, the load calculation unit 415 generates a second correlation expression between the difference Δx between the outside air humidity and the humidity in the target combination, and the latent heat load. Then, the load calculator 415 calculates the sensible heat load by substituting the difference ΔT into the first correlation formula. Also, the load calculator 415 calculates the sensible heat load by substituting the difference Δx into the second correlation equation.

Also, for example, the load calculation unit 415 generates a model for calculating the sensible heat load and the latent heat load from information such as the outside air temperature and the outside air humidity and the temperature and humidity in the target combination by machine learning or the like. Then, the load calculation unit 415 calculates the sensible heat load and the latent heat load by inputting information such as the outside air temperature and the outside air humidity and the temperature and humidity in the target combination into the model.

(Step S23: power calculation processing)
The power calculation unit 416 calculates the temperature and humidity of the target space 50 from the sensible heat load and the latent heat load calculated in step S22 for each of the multiple combinations identified in step S21. Calculate the total power required to control temperature and humidity.
Specifically, power calculation unit 416 calculates the power consumption of internal air conditioner 20 by simulating the operating state of internal air conditioner 20 when processing the sensible heat load calculated for the target combination. Further, power calculation unit 416 calculates the power consumption of outdoor air conditioner 30 by simulating the operating state of outdoor air conditioner 30 when processing the latent heat load calculated for the target combination. Power calculation unit 416 then sums the power consumption of internal air conditioner 20 and the power consumption of outdoor air conditioner 30 to calculate the total power.
The power consumption calculated here is used for comparison between combinations. Therefore, it is important that the magnitude relationship of the calculated power consumption is correct, and the accuracy of the absolute value of the power consumption is not important.

(Step S24: Target specifying process)
The target identifying unit 417 identifies a combination that reduces the calculated total power among the plurality of combinations identified in step S21.
For example, as shown in FIG. 11, assume that the sensible heat load and latent heat load are calculated for the four points shown in FIG. 10, and the total power is calculated. In this case, the target identification unit 417 identifies the combination of the temperature of 26.0° C. and the humidity of 50% that require the lowest total power.

The control process (step S13 in FIG. 6) according to Embodiment 1 will be described.
Combinations of temperature and humidity that satisfy the target values include (A) lowering the temperature and raising the absolute humidity, (B) lowering the temperature and absolute humidity, and (C) raising the temperature and raising the absolute humidity. (B') There are cases where the temperature and absolute humidity are increased.
In the case of (A), during the cooling and dehumidifying operation, the control unit 413 increases the capacity of the internal air conditioner 20 and decreases the capacity of the outdoor air conditioner 30 to increase the sensible heat cooling capacity and the latent heat cooling capacity. reduce ability. During the heating and humidifying operation, the control unit 413 reduces the capacity of the internal air conditioner 20 and increases the capacity of the outdoor air conditioner 30, thereby reducing the sensible heating capacity and increasing the latent heat heating capacity. For example, during the cooling and dehumidifying operation, the control unit 413 lowers the refrigerant evaporation temperature of the internal air conditioner 20 to increase the sensible heat capacity, raises the refrigerant evaporation temperature of the outdoor air conditioner 30, and lowers the latent heat capacity.
In the case of (B), during the cooling and dehumidifying operation, the control unit 413 increases the capacity of the internal air conditioner 20 and the capacity of the outdoor air conditioner 30 to increase the sensible heat cooling capacity and the latent heat cooling capacity. do. During the heating and humidifying operation, the control unit 413 reduces the capacity of the internal air conditioner 20 and the capacity of the outdoor air conditioner 30, thereby reducing the sensible heat heating capacity and the latent heat heating capacity. For example, during the cooling and dehumidifying operation, the control unit 413 lowers the refrigerant evaporation temperature of the internal air conditioner 20 and the external air conditioner 30 to increase the sensible heat capacity and the latent heat capacity.
In the case of (C), during the cooling and dehumidifying operation, the control unit 413 reduces the capacity of the internal air conditioner 20 and increases the capacity of the outdoor air conditioner 30 to reduce the sensible heat cooling capacity and the latent heat cooling capacity. increase ability. During the heating and humidifying operation, control unit 413 increases the capacity of internal air conditioner 20 and decreases the capacity of outdoor air conditioner 30, thereby increasing the sensible heating capacity and reducing the latent heat heating capacity. For example, during the cooling and dehumidifying operation, the control unit 413 raises the refrigerant evaporation temperature of the internal air conditioner 20 to lower the sensible heat capacity, lowers the refrigerant evaporation temperature of the outdoor air conditioner 30, and raises the latent heat capacity.
In the case of (B'), during the cooling and dehumidifying operation, the control unit 413 reduces the capacity of the internal air conditioner 20 and the capacity of the outdoor air conditioner 30, thereby increasing the sensible heat cooling capacity and the latent heat cooling capacity. make low. During the heating and humidifying operation, the control unit 413 increases the capacity of the internal air conditioner 20 and the capacity of the outdoor air conditioner 30, thereby increasing the sensible heat heating capacity and the latent heat heating capacity. For example, during the cooling and dehumidifying operation, the control unit 413 increases the refrigerant evaporation temperature of the internal air conditioner 20 and the external air conditioner 30, and reduces the sensible heat capacity and the latent heat capacity.

*** Effect of Embodiment 1 ***
As described above, in the air-conditioning system 10 according to Embodiment 1, the control device 40 sets a target value for comfort, and controls both the indoor air conditioner 20 and the outdoor air conditioner 30 based on the target value. . Since both the indoor air conditioner 20 and the outdoor air conditioner 30 are controlled, appropriate control based on comfort is possible.

Further, in the air-conditioning system 10 according to Embodiment 1, the control device 40 specifies a combination that reduces the total power among a plurality of combinations of temperature and humidity that satisfy the target value for comfort. Then, the control device 40 controls the indoor air conditioner 20 and the outdoor air conditioner 30 so that the temperature and humidity of the target space 50 match the specified combination of temperature and humidity. Therefore, it is possible to realize control of an air conditioning system that reduces power consumption while satisfying comfort.

The temperature and humidity of the indoor space are factors that affect the comfort of the indoor space. When using PMV as an index, there are many combinations of temperature and humidity that result in the same PMV. The combination of temperature and humidity will change the values of the sensible and latent heat loads. For example, if the set temperature is lowered and the set humidity is raised during cooling operation, the sensible heat load increases and the latent heat load decreases. Also, when the set temperature is increased and the set humidity is decreased during cooling operation, the sensible heat load decreases and the latent heat load increases.
In other words, in air conditioning that separates latent heat and sensible heat, the load to be processed by each of the internal air conditioner and the external air conditioner changes depending on the combination of the set temperature and the set humidity. Therefore, the power consumption of the air conditioning system 10 as a whole changes depending on the combination of the set temperature and the set humidity. Therefore, when the temperature and humidity are determined by the user, power consumption may be higher than when setting other temperature and humidity combinations that provide equivalent comfort.

***Other Configurations***
<Modification 1>
In Embodiment 1, the identifying unit 412 identifies a plurality of combinations of temperature and humidity that satisfy the target value for comfort, calculates the total power for each combination, and identifies the combination that reduces the total power. did.
As a modified example 1, the identifying unit 412 may identify a combination that satisfies the target value of comfort and reduces the total power using an optimization technique. Specifically, the specifying unit 412 uses a function that minimizes the total power as an objective function, and uses an optimization method to specify a combination that reduces the total power, with a constraint condition that the combination of temperature and humidity satisfies a target value. do.

<Modification 2>
In Embodiment 1, PMV was used as an index of comfort. However, the comfort index is not limited to PMV. Other indices may be used as comfort indices as long as they are calculated from at least temperature and humidity.

<Modification 3>
In Embodiment 1, the internal air conditioning unit 20 and the external air conditioning unit 30 are of direct expansion type. However, at least one of the internal air conditioning unit 20 and the external air conditioning unit 30 may not be of the direct expansion type as long as it is a system capable of adjusting the air conditioning capacity.

Embodiment 2.
In the power calculation process, the power calculation process of the second embodiment specifies an operating point at which the power consumption of the indoor air conditioner 20 and the outdoor air conditioner 30 is low, calculates the total power using the power consumption at the specified operating point, and performs the control. The process differs from the first embodiment in that the internal air conditioner 20 and the outdoor air conditioner 30 are controlled at the specified operating point. In the second embodiment, this different point will be explained, and the explanation of the same point will be omitted.

***Description of operation***
The specifying process (step S12 in FIG. 6) according to the second embodiment will be described with reference to FIG.
The processing of step S23 differs from that of the first embodiment.
In step S23, the power calculation unit 416 calculates the total power required to control the temperature and humidity in the target space so that the temperature and humidity in the target space match the temperature and humidity in the target combination for each of the plurality of combinations specified in step S21. to calculate At this time, the power calculation unit 416 calculates power consumption among the capacity settings of each of the internal air conditioning units 20 and the external air conditioning units 30 for controlling the temperature and humidity of the target space 50 so that the temperature and humidity of the target combination match the temperature and humidity of the target space. Calculate the total power when using the capacity setting with less power.
Specifically, the internal air conditioning unit 20 and the external air conditioning unit 30 are capable of changing capacity settings such as the refrigerant evaporation temperature. When processing the sensible heat load calculated for the target combination, the power calculation unit 416 identifies the operating point of capacity setting such as the refrigerant evaporation temperature of the internal air conditioner 20 at which the power consumption decreases. The power calculation unit 416 calculates the power consumption of the internal air conditioner 20 when the capacity setting of the specified operating point is adopted. In addition, when processing the latent heat load calculated for the target combination, the power calculation unit 416 specifies an operating point for capacity setting such as the refrigerant evaporation temperature of the outdoor air conditioner 30 at which power consumption is low. The power calculation unit 416 calculates the power consumption of the outdoor air conditioner 30 when the capacity setting of the specified operating point is adopted. Power calculation unit 416 then sums the power consumption of internal air conditioner 20 and the power consumption of outdoor air conditioner 30 to calculate the total power.

A control process (step S13 in FIG. 6) according to the second embodiment will be described.
The control unit 413 controls the internal air conditioner 20 with the capacity setting adopted when calculating the power consumption of the internal air conditioner 20 in step S23. Further, the control unit 413 controls the outdoor air conditioner 30 with the capacity setting adopted when calculating the power consumption of the outdoor air conditioner 30 in step S23.

*** Effect of Embodiment 2 ***
As described above, in the air-conditioning system 10 according to Embodiment 2, the control device 40 identifies a combination of temperature and humidity based on the power consumption in the capacity setting that reduces the power consumption. Then, the control device 40 operates the internal air conditioner 20 and the external air conditioner 30 with the capacity setting that reduces the power consumption. Therefore, the effect of energy saving assumed when specifying the combination of temperature and humidity is obtained.

In Embodiment 1, the control unit 413 controls the internal air conditioning unit 20 and the external air conditioning unit 30 based on the combination of temperature and humidity and the environmental conditions for controlling the internal air conditioning unit 20 and the external air conditioning unit 30. . Therefore, there is a possibility that the expected energy saving effect cannot be obtained when the combination of temperature and humidity is specified because the environmental conditions are different from when the combination of temperature and humidity is specified.
On the other hand, in the second embodiment, even if the environmental conditions are different from when the combination of temperature and humidity is specified, the power consumption can be reduced by setting the ability to reduce the power consumption, which is adopted when calculating the power consumption. It controls the indoor air conditioner 20 and the outdoor air conditioner 30 . Therefore, the effect of energy saving assumed when specifying the combination of temperature and humidity is obtained.

Note that even if the control process (step S13 in FIG. 6) is performed, the temperature and humidity of the target space 50 will be larger than the temperature and humidity in the combination because the environmental conditions are different from when the combination of temperature and humidity is specified. may come off. In such a case, the control unit 413 may switch to control the indoor air conditioner 20 and the outdoor air conditioner 30 according to the temperature and humidity in the combination, as in the first embodiment. good.

Embodiment 3.
Embodiment 3 differs from Embodiments 1 and 2 in that conditions other than temperature and humidity related to comfort are taken into consideration. In the third embodiment, this different point will be explained, and the explanation of the same point will be omitted.
Embodiment 3 describes a case where Embodiment 1 is modified. However, it is also possible to add changes to the second embodiment.

***Description of operation***
In Embodiment 3, a case will be described in which the average wind speed of the target space 50 is taken into account as a condition other than the temperature and humidity related to comfort. Note that the average wind speed may also be called the average air volume. Mean wind speed is included as a parameter in calculating the PMV. Therefore, if the average wind speed changes, the PMV will also change.

The overall operation of control device 40 according to the third embodiment will be described with reference to FIG.
The processing in steps S12 and S13 differs from that in the first embodiment.
In step S12, the identifying unit 412 identifies one combination from a plurality of combinations of temperature, humidity, and wind speed that satisfy the target values set in step S11. In Embodiment 3, the specifying unit 412 selects the temperature, humidity, and wind speed in the combination from among a plurality of combinations of temperature, humidity, and wind speed that satisfy the target values so that the temperature, humidity, and wind speed in the target space 50 are equal to each other. A combination that reduces the total power, which is the sum of the power consumption of the indoor air conditioner 20 and the power consumption of the outdoor air conditioner 30, is specified.

Control unit 413 controls internal air conditioner 20 and outdoor air conditioner 30 so that the temperature, humidity, and wind speed of target space 50 match the combination of temperature, humidity, and wind speed specified in step S12.
For example, the control unit 413 changes the average wind speed in the target space 50 when at least one of the wind speed and wind direction of the air blown from the internal air conditioning unit 20 or the external air conditioning unit 30 is changed by a method such as actual measurement or simulation. be specified. Referring to the change in the average wind speed corresponding to the change in conditions, the control unit 413 adjusts the wind speed in the target space 50 to match the wind speed in the combination specified in step S12. At least one of the blowing air wind speed and wind direction is changed.

The specifying process (step S12 in FIG. 6) according to the third embodiment will be described with reference to FIG.
The processes in steps S21 and S23 are different from those in the first embodiment.
In step S21, the combination identifying unit 414 identifies a plurality of combinations of temperature, humidity, and wind speed that satisfy the target PMV, which is the target value.

In step S23, the power calculation unit 416 controls the temperature, humidity, and wind speed of each of the plurality of combinations specified in step S21 so that the temperature, humidity, and wind speed in the target space match the temperature, humidity, and wind speed in the target combination. Calculate the total power required for
Power calculation unit 416 calculates the power consumption when at least one of the blown air wind speed and wind direction is changed for at least one of the indoor air conditioner 20 and the outdoor air conditioner 30 so as to achieve the wind speed in the target combination. to calculate Then, power calculation unit 416 calculates the total power in consideration of the power consumption when at least one of the blown air wind speed and wind direction is changed.

*** Effect of Embodiment 3 ***
As described above, in the air-conditioning system 10 according to Embodiment 3, the control device 40 also considers conditions related to comfort other than temperature and humidity. This allows for better control based on comfort.

The embodiments and modifications of the present invention have been described above. Some of these embodiments and modifications may be combined and implemented. Also, any one or some may be partially implemented. It should be noted that the present invention is not limited to the above embodiments and modifications, and various modifications are possible as required.

10 air conditioning system, 20 indoor unit, 21 outdoor unit, 22 indoor unit, 23 refrigerant pipe, 24 temperature detection device, 25 temperature detection device, 211 compressor, 212 four-way valve, 213 outdoor heat exchanger, 214 outdoor fan, 215 refrigerant pipe, 221 indoor heat exchanger, 222 expansion valve, 223 indoor fan, 224 refrigerant pipe, 30 outdoor unit, 31 outdoor unit, 32 outdoor air supply unit, 33 refrigerant pipe, 34 humidity detector, 35 humidity detector, 311 compressor, 312 four-way valve, 313 outdoor heat exchanger, 314 outdoor fan, 315 refrigerant pipe, 321 heat exchanger, 322 expansion valve, 323 refrigerant pipe, 324 air supply fan, 325 exhaust fan, 326 heat exchanger , 40 control device, 41 processor, 42 memory, 43 storage, 44 communication interface, 411 setting unit, 412 identification unit, 413 control unit, 414 combination identification unit, 415 load calculation unit, 416 power calculation unit, 417 target identification unit, 50 object space.

Claims (6)

An internal air conditioner that operates according to a sensible heat load, takes in air in a target space, adjusts the temperature, and outputs the air to the target space, and operates according to a latent heat load, and extracts air outside the target space. A control device for controlling an air conditioning system comprising an outdoor unit that takes in, adjusts the temperature, and outputs to the target space,
a setting unit that receives input of information regarding the comfort of the target space and is specified from at least temperature and humidity, and sets a target value for the comfort;
a combination identifying unit that identifies a plurality of combinations of temperature and humidity that satisfy the target value for the comfort set by the setting unit;
a load calculation unit that calculates a sensible heat load and a latent heat load for adjusting the temperature and humidity of the target space to the temperature and humidity in the target combination for each of the plurality of combinations specified by the combination specifying unit;
For each of the plurality of combinations , specifying as a first temperature the refrigerant evaporation temperature of the internal conditioner when processing the sensible heat load calculated by the load calculation unit for the target combination, and specifying the first temperature and calculating the refrigerant evaporation temperature of the outdoor unit when processing the latent heat load calculated by the load calculation unit for the target combination as a second temperature and calculating the power consumption of the outdoor air conditioner when the second temperature is adopted, so that the temperature and humidity in the target space are the same as the temperature and humidity in the target combination. a power calculator that calculates the total power required;
a target identification unit that identifies, from the plurality of combinations, a combination that reduces the total power calculated by the power calculation unit;
Using the first temperature and the second temperature for the combination specified by the target specifying unit, the refrigerant evaporation temperature of the internal air conditioner becomes the first temperature, and the refrigerant evaporation temperature of the outdoor air conditioner and a control unit that controls so that the temperature becomes the second temperature . The power calculation unit controls the temperature and humidity of the target space so that the temperature and humidity of the target space are the same. calculating said total power when employing a capacity setting;
2. The control device according to claim 1, wherein the control unit controls the internal air conditioning machine and the external air conditioning machine according to the capacity setting adopted when calculating the total electric power. The comfort is specified from temperature and humidity and other conditions,
The combination identifying unit identifies the plurality of combinations of temperature, humidity, and other conditions that satisfy the target values,
The load calculation unit calculates, for each of the plurality of combinations, a sensible heat load and a latent heat load for changing the temperature and humidity of the target space to the temperature and humidity under other conditions in the target combination,
For each of the plurality of combinations, the power calculation unit converts the temperature and humidity of the target space from the sensible heat load and the latent heat load for the target combination to the temperature and humidity under other conditions in the target combination. and calculating the total power required to control the humidity to be
The control unit adjusts the temperature, humidity, and other conditions of the target space to match the temperature, humidity, and other conditions in the combination specified by the target specifying unit. 3. A control device according to claim 1 or 2 for controlling a machine. The control unit controls the temperature and humidity that achieve the specified target values with respect to the temperature and humidity of the target space,
When the temperature is low and the humidity is high, the capacity of the internal air conditioner is increased and the capacity of the outdoor air conditioner is decreased during the cooling and dehumidifying operation, and the capacity of the internal air conditioning machine is decreased during the heating and humidifying operation. together with increasing the capacity of the outdoor air conditioner,
When the temperature is low and the humidity is low, the capacity of the internal air conditioner is increased and the capacity of the outdoor air conditioner is increased during the cooling and dehumidifying operation, and the capacity of the internal air conditioning machine is decreased during the heating and humidifying operation. together with lowering the capacity of the outdoor air conditioner,
When the temperature is high and the humidity is low, the capacity of the internal air conditioner is lowered and the capacity of the outdoor air conditioner is increased during the cooling and dehumidifying operation, and the capacity of the internal air conditioning machine is increased during the heating and humidifying operation. together with lowering the capacity of the outdoor air conditioner,
When the temperature is high and the humidity is high, the capacity of the internal air conditioner is reduced during the cooling and dehumidifying operation, and the capacity of the external air conditioning machine is reduced during the heating and humidification operation, and the capacity of the internal air conditioning machine is increased during the heating and humidifying operation. 4. The control device according to any one of claims 1 to 3, which increases the capacity of said outdoor air conditioner together with said air conditioner. An internal air conditioner that operates according to a sensible heat load, takes in air in a target space, adjusts the temperature, and outputs the air to the target space, and operates according to a latent heat load, and extracts air outside the target space. An air conditioning system comprising an outdoor unit that takes in, adjusts the temperature, and outputs to the target space, and a control device,
The control device is
a setting unit that receives input of information regarding the comfort of the target space and is specified from at least temperature and humidity, and sets a target value for the comfort;
a combination identifying unit that identifies a plurality of combinations of temperature and humidity that satisfy the target value for the comfort set by the setting unit;
a load calculation unit that calculates a sensible heat load and a latent heat load for adjusting the temperature and humidity of the target space to the temperature and humidity in the target combination for each of the plurality of combinations specified by the combination specifying unit;
For each of the plurality of combinations , specifying as a first temperature the refrigerant evaporation temperature of the internal conditioner when processing the sensible heat load calculated by the load calculation unit for the target combination, and specifying the first temperature and calculating the refrigerant evaporation temperature of the outdoor unit when processing the latent heat load calculated by the load calculation unit for the target combination as a second temperature and calculating the power consumption of the outdoor air conditioner when the second temperature is adopted, so that the temperature and humidity in the target space are the same as the temperature and humidity in the target combination. a power calculator that calculates the total power required;
a target identification unit that identifies, from the plurality of combinations, a combination that reduces the total power calculated by the power calculation unit;
Using the first temperature and the second temperature for the combination specified by the target specifying unit, the refrigerant evaporation temperature of the internal air conditioner becomes the first temperature, and the refrigerant evaporation temperature of the outdoor air conditioner and a control unit that controls so that the temperature reaches the second temperature . An internal air conditioner that operates according to a sensible heat load, takes in air in a target space, adjusts the temperature, and outputs the air to the target space, and operates according to a latent heat load, and extracts air outside the target space. A control method for an air conditioning system including an outdoor unit that takes in, adjusts the temperature, and outputs to the target space,
A control device, which is the comfort of the target space, receives input of information on comfort specified at least from temperature and humidity, sets a target value for the comfort,
The controller identifies a plurality of combinations of temperature and humidity that satisfy the target values;
A control device calculates a sensible heat load and a latent heat load for making the temperature and humidity in the target space the temperature and humidity in the target combination for each of the plurality of combinations,
The control device targets each of the plurality of combinations and specifies, as a first temperature, a refrigerant evaporation temperature of the internal air conditioner when processing the sensible heat load calculated for the target combination, and sets the first temperature to calculating the power consumption of the internal air conditioner in the case where the By calculating the power consumption of the outdoor air conditioner when two temperatures are adopted , the total power required to control the temperature and humidity of the target space to match the temperature and humidity of the target combination is calculated. death,
A control device identifies a combination that reduces the total power from the plurality of combinations,
A control device uses the first temperature and the second temperature for the specified combination to set the refrigerant evaporation temperature of the internal air conditioner to the first temperature and the refrigerant evaporation temperature of the outdoor air conditioner to the first temperature. A method of controlling an air conditioning system for controlling the second temperature .

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